Is there a pin-compatible replacement for 0402L050SLKR?

Yes, several alternatives are available in the same 2-pin 0402 package, making them physically pin-compatible. However, you must verify electrical parameters like max fault current (Imax) to ensure functional suitability.

What risks should I check before replacing 0402L050SLKR?

The main risk is the maximum fault current (Imax), which may be lower on alternatives (e.g., 40A vs. 50A). Also, review the datasheet for differences in trip time and resistance characteristics, which can affect circuit protection behavior.

0402L050SLKR Alternatives, Datasheet & Cross Reference | Littelfuse

The Littelfuse 0402L050SLKR is a compact, surface-mount resettable PTC fuse designed for reliable overcurrent protection in low-voltage circuits. It features a 0.5A hold current and 6V maximum voltage rating.

AI replacement insight

Electrical risklow

Key parameters match, but max fault current may be lower. Verify against system requirements.

Package risklow

Candidates share the same standard 0402 package, ensuring physical compatibility.

Can it be replaced directly?

Yes, parts like BHFUSE BSMD0402L-050 and LUTE 0402L050SL6SR are strong functional alternatives with the same key ratings.

Best replacement path

Cross-vendor alternatives like BHFUSE BSMD0402L-050 offer a close parametric match in the same 0402 package.

Main risk

The primary risk is a lower maximum fault current rating (Imax) in some alternatives, which may be insufficient for the application.

Recommended alternatives

Functionally similar PTC fuse in the same 0402 package, but with a lower max fault current rating.

View details

Alternative comparison matrix

Feature / factor	0402L050SLKR	0402L050SL6SR	BSMD0402L-050	Compatibility / risk
Package	0402	0402	0402	0402 — Package size matches.; BSMD0402L-050: Package size matches.
Voltage	6.0V	6.0V	6.0V	6.0V — Maximum voltage rating matches.; BSMD0402L-050: Maximum voltage rating matches.
Current	50A	40A	40A	40A — Max fault current is lower.; BSMD0402L-050: Max fault current is lower.

Application & sourcing insights

Questions & answers

The best alternatives for 0402L050SLKR are BHFUSE BSMD0402L-050 and LUTE 0402L050SL6SR. Both match the hold current (0.5A), voltage (6V), and 0402 package, but have a slightly lower max fault current rating.